Apparatus for the magnetic ignition in explosion-motors.



G. A. UNTERBERG. APPARATUS FOR THE MAGNETIC IGNITION IN EXPLOSION MOTORS. APPLICATION FILED JAN,31, 1906.

909,483. Patented Jan. '12, 1909.

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1712 55m fnrzniar: V tfzzsiwida Mario M dial way G. A. UNTERBERG.

APPARATUS FOR THE MAGNETIC IGNITION IN EXPLOSION MOTORS. KIPLIGATION FILED 3111.31, 1906.

909,483. Patented Jan. 12, 1909.

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GUSTAV ADOLF UNTERBERG, OF KARLSRUH E-MIJHLBERG, GERMANY.

APPARATUS FOR THE MAGNETIC IGNITION IN EXPLOSION-MOTORS.

Specification of Letters Patent.

Patented Jan. 12, 1909.

Application filed. January 31, 1906. Serial No. 298,818.

To all whom it may concern:

Be it known that I, GUSTAV AnoLr UNTER- BERG, a citizen of the German Empire, residing at No. 46 Bachstrasse, Karlsruhe-Miihlberg, Baden, Germany, have invented a new and useful Improved Apparatus for the Ma netic Ignition in Explosion-Motors, of whic the following is a description.

The present invention relates to apparatus for producing magnetic ignition in explosion motors and especially to those apparatuses in which, when the motor is running slowly, the armature-shaft is temporarily arrested, for the purpose of being 'erked forwards at the moment of ignition, y the action of a spring, which has been stretched in the meantime, thus producing a spark, sufliciently strong to ignite the eXiplosive-mixture.

The main feature 0 the present device in view of older similar devices is that the stop is formed by a ball loosely mounted in a slot of one of the members so that friction is entirely avoided.

The invention is hereafter described with reference to the accompanying drawing, in

which 2 an 3 are views of the respective coupling parts and Fig. 4 shows the whole apparatus partly in section.

The con ling member a is keyed to the armature-s aft 1;, the coupling member 0 being loosely mounted on this shaft. The two coupling-members are connected by the torsional spring d. The coupling member 0 is provided with a toothed mm c, by means of which it may be driven from any suitable source. In the coupling member o a slot a is provided, in which a ball f is arran ed.

On rotation being imparted to the coup g couphng members a and 0 against each other is limited by the pin engaging the slot h of- At a suitable part the coupling member 0. of the couplin member 0 there is provided a cavity 7c, wlnc on the relative movement of the two parts a and 0 against each other finally registers with the ball (Fig. 1 in dotted lines) and allows the said ball to pass the stop g.

The device operates in the following manner:-When the motor is running slowly, for

instance, on starting, the ball f is in its initial re 1 is alongitudinal section, while Figs.

position, and on the rotation of the coupling member a strikes against the stop 9 and arrests the coupling part a against further rotation, until the cavity 70 of t 1e latter registers with the said ball f. The latter enters the said cavity 7c (Fig. 1 in dotted lines) and thus comes out of contact with the stop 9, so that the coupling member a, and with it the armature-shaft of the apparatus is erked forwards by the action of the torsional spring, its movement being limited by the slot h and the pin 11. This accelerated movement of the armature is used for producing the spark for the ignition. As soon as the speed of the motor increases the temporary acceleration will become superfluous and the ball f flies outwards, owing to the centrifugal power, into the position shown in dotted lines, and is thus out of the reach of the stop g. Then the coupling a, 0 works like a fast connection.

I claim as my invention:

1. In a device for operating magnetic igniting apparatus for explosion motors the combination of two coupling members, an armature shaft on which the said coupling members are arranged, the one being fast and the other loose thereon, a spring, connecting the said coupling members, means for driving the loose coupling member, a slot in the fast coupling member, a ball loosely mounted in the said slot, a sto a ainst which the said ball strikes, said all sing adapted to be moved out of reach of the said stop by centrifugal force, a slot in the loose coupling part, a pin, mounted on the fast coupling part and engaging said slot for limiting the rotation of the two coupling arts against each other, and a cavity in the oose coupling part, into which the said ball may enter, to pass the said stop, substantially as described.

2. In a device for operating magnetic igniting apparatus for explosion motors the combination of the coupling members a and c, an armature shaft 6, upon which the said member a is fixed and the said member 0 is loosely mountedga spring d, connecting the two members a and c, circumferential tooth gearing e on the said member 0, for transferrin motion to the same, a ballf, a slot a in which the said ball is loosely mounted, a stop 9, against which the said ballmay strike, thus temporarily arresting the part a against further rotation, said bal being adapted to be moved out of reach of the said stop by centrifugal force, a slot in the member 0, a

Q seams pin '11, engaging the said slot and limiting the said slot, and a sto g for the ball to temporelative rotation of the said coupling rnemrarily arrest the sai part a against rotation,

bers a and 0 against each other, and a cavity said ball being adapted to be moved out of kinthe said part c, substantially as described. reach of the said stop by centrifugal force, 15 5 3. In a device for operating magnetic substantially as described.

igniting apparatus for explosion motors the In testimony whereof I aflix my signature combination of the armature shaft 6, a coupin the presence of two witnesses.

ling member a, rigidly mounted on the said GUSTAV ADOLF UNTERBERG. armature shaft, and a coupling nember c Witnesses: 10 loosely mounted thereon, a slot a 1n the stud THUR HUNOEBERG,

member a, a ball f, loosely mounted in the H. W. HARRIS. 

